| Salmon-red rainbowfish Glossolepis incisus |  |
| Salvins cichlid Cichlosoma salvini |  |
| Schwartz's Corydoras Corydoras schwartzi |  |
| Senegal bichir Polypterus senegalus |  |
| Short-Finned Molly, Liberty Molly, Black Molly, Molly Poecilia sphenops |  |
| Siamese fighting fish Betta splendens | |
| Silver hatchet fish Gasteropelecus sternicla | |
| Silver prochilodus Semaprochilodus taeniurus |  |
| Silver shark, Tricolor sharkminnow, Tricolor Shark, Bala shark Balantiocheilos melanopterus |  |
| Silver-tipped tetra Hasemania nana | |
| Skunk cory, Arched cory Corydoras arcuatus | |
| Spotted Blue-eye Pseudomugil gertrudae | |
| Spotted Rasbora, Dwarf Rasbora Rasbora maculata | |
| Spotted scat, Red tiger scat, Green scat Scatophagus argus |  |
| Steel blue Aphyosemion Fundulopanchax nigerianus |  |
| Sterba's Cory Corydoras sterbai |  |
| Striped headstander Anostomus anostomus | |
| Striped killifish Aphyosemion striatum |  |
| Swordtail Xiphophorus helleri |  |
| species Jumbo Kitumba Cyprichromis leptosoma |  |
| Scatophagus argus Spotted scat, Green scat, Red tiger scat | |
| Scleromystax barbatus Bearded catfish, Banded cory, Giant cory | |
| Scleropages formosus Golden Arowana |  |
| Semaprochilodus taeniurus Silver prochilodus | |
| Simpsonichthys magnificus |  |
| Stigmatogobius sadanunidio Knight goby |  |
| Symphysodon aequifasciatus Discus |  |
| Synodontis angelicus Angel catfish | |
| Synodontis eupterus Feather fin catfish |  |
| Synodontis nigriventris Upside-down catfish |  |
| Synodontis notatus One-spot catfish |  |
| Synodontis schoutedeni Jaguar catfish |  |
Vegetarian fish Some catfish have a largely vegetarian diet; feed them potato, lettuce, cucumber or blanched peas. Some of these will have to be weighted down, or held in place with a commercially available lettuce grip (magnetic clips are far better than suction types). As with all fish, do not over feed; remove uneaten vegetable matter after a couple days